SomeFunctions

#include <iostream>
#include <stdio.h>

using namespace std;

//list
void PowerA3(int A, int *B);
void PowerA234(int A, int *B);
void Mean(int X, int Y, double *AMean, double *GMean);
void TrianglePS(int A, int *P, double *S);
void RectPS(int x1, int y1, int x2, int y2, int *P, int *S);
void DigitCountSum(int k, int* c, int* s);
void InvertDigits(int *k);
void AddRightDigit(int d, int* k);
void AddLeftDigit(int d, int* k);
void MinMax(double *x, double *y);
void Swap(double *x, double *y);
void SortInc3(double *a, double *b, double *c);
//--------------

void PowerA3(int A, int *B)
{
    *B = A*A*A;
}

void PowerA234(int A, int *B, int *C, int *D)
{
    *B = A*A;
    *C = (*B)*A;
    *D = (*C)*A;
}

void Mean(int X, int Y, double *AMean, double *GMean)
{
    *AMean = ((double)X + Y) / 2;

    *GMean = sqrt(X * Y);
}

void TrianglePS(int A, int *P, double *S)
{
    *P = A*3;
    *S = sqrt(3*A*A)/4;
}

void RectPS(int x1, int y1, int x2, int y2, int *P, int *S)
{
    *S = abs(x1 - x2) * abs(y1 - y2);

    *P = abs(x1 - x2) * 2 + abs(y1 - y2) * 2;
}

void DigitCountSum(int k, int* c, int* s)
{
    while(k > 0)
    {
        (*c)++;
        *s += k % 10;
        k /= 10;
    }
}

void InvertDigits(int *k)
{
    int x = 0;
    while (*k > 0)
    {
        x *= 10;
        x += *k % 10;
        *k /= 10;
    }
    *k = x;
}

void AddRightDigit(int d, int* k)
{
    *k *= 10;
    *k += d;
}

void AddLeftDigit(int d, int* k)
{
    InvertDigits(k);
    AddRightDigit(d, k);
    InvertDigits(k);
}

void Swap(double *x, double *y)
{
    *x = *x + *y;
    *y = *x - *y;
    *x = *x - *y;
}

void MinMax(double *x, double *y)
{
    if (*x > *y) Swap(x, y);
}

void SortInc3(double *a, double *b, double *c)
{
    MinMax(a, b);
    MinMax(a, c);
    MinMax(b, c);
}